The municipality wis creatit gradually in 1967, 1971 an 1974 durin the last local govrenment reform when the Ceety o Trollhättan (itsel institutit in 1916) wis amalgamatit wi surroondin municipalities.

The municipality itsel prefers tae uise the denomination Trollhättans stad (Ceety o Trollhättan) for the entire territory, includin rural auries. This is purely nominal an haes nae effect on its status as a unitary municipality. The day, it is the hame o Saab Automobile.